G&L MMC-A2, Hardware Manual

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Installation, Operation, & Maintenance
G & L Motion Control Inc. MMC Hardware Manual 27
3.8.6 Diagnostic Error Codes
While the MMC is running, the Diagnostic light (D) on the CPU
module will flash a three digit code signal if there is an error. For
example, if there is a long pause-flash-pause-flash-flash-pause-
flash-flash-flash-long pause, the code is 123. The errors are
described below.
Table 3-3: Diagnostic Light Error Codes
Code Error Description
123 Scan too long A ladder scan loss has occurred because the CPU
takes more than 200 ms to scan the application
program.
124 Excessive overhead The system overhead update time is excessive.
Consult the factory.
125 Insufficient memory There is insufficient memory on the CPU to run the
current program.
222 Driver error No driver support on the CPU for the Option module.
Update your system EPROMs.
22_ Master rack error An Option Module in the master rack (or the Motion
Control Board in a Standalone MMC Control) do not
match what was declared in the hardware master
declaration table. The number of flashes in the third
digit (_) identifies the slot number that is in error. The
first Option Module is Slot 3.
3_ _ Expansion rack error The Block I/O modules installed do not match what
was declared in the expansion hardware declaration
table.
The number of flashes in the second and third digits
indicates the block I/O module (01 through 77). The
second digit will flash a 1 - 7, 10 for 0. The third digit
will flash a 1 - 9, 10 for 0.
For example, if the second digit flashes
3 times and
the third digit flashes 10 times, the module 30 is being
reported.
621 Low Battery The MMC has detected that the on-board battery is
low and needs to be replaced as soon as possible (Not
for Standalone Digital MMC Control).